It seems to only happen on cold mornings or days when its a little hard to start from the cold. It sounds like a moaning power steering pump but i can feel the vibration really strong in the peddles and steering wheel. It changes with RPM but it also changes and goes away with how much brake pressure i add. Any ideas?

Thanks,
Brendan

 

You can feel it in the pedals because it has hydro boost. The power brakes uses the power steering pump for power assist. Changing the power steering fluid to synthetic might help.

 

Mine did the same thing this morning. It was 15*.
How do you get the old PS fluid out to change it?

 

Fluid out with turkey baster or a suction pump. Could take a return hose off and dump but makes mess. I suck, refil, run, suck, refil, run, and repeat until fluid clears up. Unfortunatelly takes about 2 qts to do this way.
OH, YES, Somewhere you will lose pump prime. Rev engine slightly, turn steering wheel, and pump brakes. Now the fluid is filled with air bubbles.
Let it set for 20 minutes and continue. Should be no bubbles on dip stick when done.